We figured it was a March Brown too. I was with Ron, who you meet on the Little J last year and we figured it was very early as well. If I recall it was a little warmer earlier that week. Naturally when I arrived it got cold, windy and the fish shut down.

I'd agree with Dryfly too. MB. It should be noted dry warm Springs will/could advance any particular hatch. Like wise, if you have weather like last Spring, then the hatches could be late. Of course I said "Could" as there are always variables to be considered.

BAETIDAE Callibaetis hatches every year about that time all over the north central region and is mistaken for MB's and gray fox all the time..had a good hatch this past spring but water was to high on pine, but smaller streams produced..

I'll trust the biological markers, such as hind wing size, over color and timing, every time. They usually aren't enough to close the book on an ID, but they're enough to eliminate a number of the possibilities.

The picture isn't perfect, but if that is indeed a large hind wing like I think it is, then Callibaetis would be eliminated. I'd remain open to other ID's with the large hind wing, and there's still a number of possibilities.

It's a little early for March Browns in those parts, but not ridiculously so. I'm stickin with it for now.

Your latest picture I'd guess to be a Baetisca genus, of the Baetiscidae family (armored mayflies). Despite the similarity in names, it's an entirely different family than Baetidae, and not all that closely related to Baetis or Callibaetis.

never said it was related, just another mistaken for the MB. Here it comes off the end of may-beginning of June. On a breezy day they sail like small sailboats all over and the browns go nuts.. Most guys who are not sure of what species group alot of speckled flies as MB's and Foxes when they are not..See it all the time on the streams..